fs: Create a header file for filesystem-related commands

Most commands access the filesystem through the command-line interface
rather than the filesystem API itself. Add a new header file which
contains these functions, so we can separate commands from the API.

Signed-off-by: Simon Glass <sjg@chromium.org>

cmd/ext2.c

@@ -20,7 +20,7 @@
  * Ext2fs support
  */
 #include <command.h>
-#include <fs_legacy.h>
+#include <fs_cmd.h>
 
 static int do_ext2ls(struct cmd_tbl *cmdtp, int flag, int argc,
 		     char *const argv[])